Given Marilyn's extensive experience and skills, I've estimated her hourly rate to be $25. This rate is relatively low compared to industry standards for professionals with similar experience. However, considering her retired status, this rate is more reflective of her current earning capacity. For context, entry-level administrative assistants with similar skills can earn around $15-$20 per hour. Marilyn's experience and skills would typically command a higher rate, but her retirement status reduces her earning potential.